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ATTORNEYS 

1. A PROCESS FOR THE PRODUCTION OF PREFORMS, COMPOSED OF ORGANIC AND INORGANIC FIBERS AND HAVING ALL SECTIONS THEREOF, WHETHER OF UNIFORM OR NON-UNIFORM THICKNESS, OF UNIFORM DENSITY AND COMPOSITION, BY PRESSURE FORMING MEANS HAVING SLURRY COMPRESSING ELEMENTS COMPRISING (A) MIXING A CARRIER FLUID WITH ORGANIC FIBERS TO PROVIDE A PULP, (B) MEASURING OUT A QUANTITY OF SAID PULP, (C) ADDING TO THE MEASURED QUANTITY OF PULP A PREDETERMINED QUANTITY OF BUNDLES OF INORGANIC FIBERS TO PROVIDE A BATCH OF SLURRY SUFFICIENT FOR ONE PREFORM, (D) IMMEDIATELY THEREAFTER COMPRESSING THE BATCH OF SLURRY BY THE PRESSURE FORMING MEANS TO REMOVE THE CARRIER FLUID AND PRODUCE A PREFORM AND (E) SUBJECTING THE BATCH OF SLURRY, FROM ITS INCEPTION UP TO AND INCLUDING COMMENCEMENT OF THE SLURRY COMPRESSING OPERATION, TO MILD AGITATION SUFFICIENT TO MAINTAIN THE ORGANIC FIBERS AND THE BUNDLES OF INORGANIC FIBERS UNIFORMLY DISPERSED THROUGHOUT THE SLURRY, WITHOUT DESTROYING THE INTEGRITY OF THE BUNDLES. 